﻿I20 LAMPSTIJS 



Unio radians Lea, Pr. Ac. N. Sci. Phila., IX, 1857, p. 32 ; Jl. 

 Ac. N. Sci. Phila., IV, 1859, p. 201. pi. xxiii, fi.c^. 84; Obs.. 



VII, 1859, p. 19. pi. xxiii, fig-. 84. 

 Margaron (Unio) radians Lea, Syn.. 1870, p. 46. 



Unto jonesii Lea, Pr. Ac. N. Sci. Phila., Ill, 1859, p. 171 ; Jl, 

 Ac. N. Sci. Phila., IV, i860, p. 339, pi. i.tv. fig:. 164; Obs., 



VIII, i860, p. 21, pi. Liv, fig:. 164. 

 Margaron (Unio) jonesii Lea, Syn., 1870, p. 48. 



Unio discrepans Lea. Pr. Ac. N. Sci. Phila.. IV, i860, p. 92; 



Jl. Ac. N. Sci. Phila.. IV. 1860, p. 340, pi. i.v, fig. 165 ; Obs., 



VIII, i860, p. 22. pi. LV, fig. 165. — SowERBY, Conch. Icon., 



XVI, 1866, pi. XXX TV, fig. 176. 

 Margaron (Unio) discrepans Lea, Syn., 1870, p. 48. 

 Unio scitulus Lea, Pr. Ac. N. Sci. Phila., TV, i860, p. 93 ; Jl. 



Ac. N. Sci. Phila., IV, i860, p. 342, pi. i.v, fig. 167; Obs., 



VIII, i860, p. 24, pi. I.V, fig. 167. 

 Margaron (Unio) scittihts Lea, Syn., 1870, p. 45. 

 Unio lingutcformis Lea, Pr. Ac. N. Sci. Phila., IV, i860, p. 



305; Jl. Ac, N. Sci. Phila., IV, i860, p. 345, pi. lvi, fig. 170; 



Obs., VIII, i860, p. 27, pi. LVI, fig. 170. 

 Margaron (Unio) lingu{cformis Lea, Syn., 1870, p. 48. 

 Unio perpictus Lea, Pr. Ac. N. Sci. Phila., IV, i860, p. 306; Jl. 



Ac. N. Sci. Phila.. IV, i860, p. 350, pi. lviii, fig. 175 ; Obs., 



VIII, i860, p. 32. pi. LVIII, fig. 175. 

 Margaron (Unio) perpictus Lea, Syn., 1870, p. 44. 

 Unio spams Lea, Pr. Ac. N. Sci. Phila., XX, 1868, p. 143 ; Jl. 



Ac. N. Sci. Phila., VI, 1868, p. 306, pi. xlvii, fig. 119; Obs., 



XII, p. 66, pi. XLVii, fig. 119. 

 Margaron (Unio) sparus Lea, Syn., 1870, p. 45. 

 Unio suhrostrohis Kuster, Conch. Cab. L^nio, 1861. p. 203, 



pi. LXVIII, fig. I. 



I have united a number of nominal species under this, which 

 seems to be the oldest name. Conrad's figure of U. ncbnlosus 

 in the New Fresh Water Shells well represents a male specimen 

 of Lea's cumberlandicus and a number of other so-called spe- 

 cies. Conrad state? that his shell is thin, while a majority of the 



